Augustus jahant



(No Model.)

A. 'JAHA-NT. DRAFT ATTACHMENT FOR FURNACES.

No.569,204. v Patented Oct. 13,1896.

7 Wz bu did v h v UNITED STATES PATENT ()FFICE.

AUGUSTUS JAHANT, OF AKRON, OHIO, ASSIGNOR OF ONE-HALF TO JOHN C. WEBER,OF SAME PLACE.

DRAFT ATTACHMENT FOR FURNACES.

SPECIFICATION forming part of Letters Patent No. 569,204, dated October13,1896.

Application filed June 15, 1896.

To all whom it may concern,-

Be it known that I, AUGUST-US JAHANT, a citizen of the United States,and a resident of the city of Akron, in the county of Summit and Stateof Ohio, have invented certain new and useful Improvements in DraftAttachments for Supplying Air to the Fire-Boxes of Furnaces or Stoves,of which the following is a specification.

The nature of my invention pertains to devices for controlling anddirecting the current of air to the fire-chamber of stoves or furnacesby means of two funnel-shaped attachments, one of which, for theinduction, is placed at the air-receiving end of the draftfiue andoperates in connection with self-rotating vanes that intercept andimpart a centrifugal action to the current of inflowing air which passesthrough the same, the other, for the eduction, being placed at the endof the draft-flue near where it enters the combustion-chamber, theoutlet throughwhich the air flows into the fireplace-being much smallerthan the same in the air-receiving attachment, thereby regulating andcontrolling the air as it enters the combustion-chamber and causing itto more readily mix and distribute itself within the fire-chamber toeffect a more perfect combustion and consumption of the inflammablegases, as willhereinafter be more fully set forth.

In order to enable others skilled in the art to make and use the same, Iwill now proceed to describe its construction and opera tion, referringto the vannexed drawings, in which Figure 1 represents a verticalsection of a furnace with my invention attached thereto; Fig. 2, a sideview of the receiving end of the draft-flue; Fig. 3, an end view of theselfrotating vane. Fig. at represents the attachments placed within thedraft-flue of a hotair overdraft-furnace.

In the drawings, A represents the induction funnel-shaped attachment atthe air-receiving end of the draft-flue; A, the eduction funnel-shapedattachment placed at the end of the draft-flue near where it enters thecombustion-chamber; B, thefurnace draft=flues; B, the draft-air-heatingchamber; 0, the firechamber; D, the fire-box; E, the attachment- SerialNo- 595,667. (No model.)

supporting frame; F, revolving vanes; F, the axle thereof. F is a flangeor shield or projecting inner surface placed within theattachment-supporting frame E to protect the rotary vanes from dust orobstructions; G, the smoke-pipe check; G, its door.

Myinvention is equally applicable to the use of hot or cold air and tothe draft-flue locating above or below the fire, and can be attached toany furnace. One or more may be used in connection therewith.

The vanes are secured obliquely to a central shaft which is free torevolve in its supporting-frame that is inserted within the flue,

which may have the ordinary sliding or hinged closing or regulatingdoor.

My device is adapted to be inserted within any form of draft-flue, andby the use thereof I am enabled to control and regulate the inflowingair that supplies the oxygen to maintain a uniform combustion whileamoderate amount of heat is evolved, which is of a uniform character andmaintains the fire for a much longer period of time, and complete andperfect combustion is insured, and that portion of the fuel which by theordinary process escapes combustion and is carried up by the current ofhot air and known as soot is entirely consumed, which economizes fuel,and I am enabled to utilize the greater proportion of the total heatobtained in the combustion of the fuel and prevent its being carried 0Eby the escaping gases, as is the case when the force of the draft isadmitted directly into thefire-chamber.

The combustion of the fuel is increased or diminished by the force ofthe draft on the fire; but my device regulates the supply and furnishesonly a moderate quantity of oxygen as itis demanded and disseminates itthrough out the fire-chamber, and thus produces the most perfectcombustion and secures an even regular heat thereby and conduces togreat economy in the use of fuel.

The draft being regulated and controlled enters the fire-chamberuniformly and does not chill the heat that is being evolved, and a moreuniform temperature is maintained within the combustion-chamber.

The smoke-pipe is provided with the check draft-regulating dooroperating in the usual well-known manner, and when said door is raisedthe infiowing draft and consequently the rapidity of movement of therotary vanes is decreased.

By the use of my device what is termed slack coal can be burned withoutany of the objections commonly prevailing against its use as a fuel, asthe gases generating in the fire-box are entirely consumed, thuspreventing the usual smoke and soot caused by the formation of thecarbonic oXid of gas, as it facilitates regular combustion andconsumption of the gases arising in combustion, and the slack coalbecomes a coke, the bitumen and sulfur having been gradually andperfectly consumed, at which stage of combustion the drafts may beentirely closed or checked, and the now coked fuel will retain itsheating properties in the ordinary process of combustion, while thefurnace and flues and chimney are free from soot deposit.

In burning anthracite or hard coal theapplication of my device insuresaneconomical consumption. of fuel and maintains a more regular fire anduniform production of heat than any of the draft appliances ordinarilyused and saves a large per cent. of the coal;

The use of my device in connection with my hot-air overd-raft-furnace,as shown in Fig. 1, in which the cold air enters the draftair-heatin gchamber B, and after it is heated enters the fire-chamber abovethe-fireto'secure a downdraft, produces desirable results, as heretofore stated,and I find it to be a very important improvement, enabling meto burncheaper and inferior qualities of fuelwithout producing smoke orclinkers.

In someatmospheric conditions the revolving vanes may be-omitted fromthe draft-flue and favorable results secured by the use of thefunnel-shaped attachments. I

I do not restrict myself to the funnel shape of the attachment, as itmay be of any form and have the contracted opening.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is

1. In a heating-furnace the combination with the fire-chamber O, of thedraft-flue B provided with the inclosed supporting-frame -E with itsfunnel-shaped induction attach- ,ment A, and the rotary vanes F, theflange or shield F, said draft-flue B being also provided with theeduction funnel-shaped attachment A, the opening of which is smallerthan the opening of the induction attachment A operating substantiallyas shown and def scribed;

2. Ina heating-furnace the combination of the draft-flue B provided withthe induction attachment A and the eduction: attachment A as a means ofsupplying air to the combustion-chamber substantially as shown: and

. described.

. 3. The draft-flue B provided with the attachment-supporting frame E,its self-rotat- .ing vane F,.and the flange or shieldF operatingsubstantially as shown and described.

